psychological addiction is a real thing. it is as real as physical addiction. you cant physically be addictied to food, but people are. its in their minds, but its real.
you will not have seizures from quiting cold turkey, as some really intelligent person above mentioned, but it will still be difficult. this is how rumors get started and then you dont know the truth from fabrication.
as for the addiction to tv and video games, thats just parents trying to scare their kids. the term addiction is used entirely too frivolously when referring to kids, tv and video games. makes me want to smack parents. when their kid is out selling their bodies to get xbox 360, then they can say its an addiction, ok???